仲間入りなかまいり Common Noun Irregular Intransitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru intransitive verb joining (a group);becoming a member (of);joining the ranks (of) その僧は子供達の遊びに仲間入りした。 The priest participated in the children's games.